Triple capacity plunger pump



y 1953 w. R. REED 2,565,?

TRIPLE CAPACITY PLUNGER PUMP Filed June 1, 1949 4 Sheets-Sheet 1 INVENTOR.

' M/ E, Reed ATTD R N EYE Jufiy 17, 31951 w. R. REED TRIPLE CAPACITY PLUNGER PUMP 4 Sheets-Sheet 2 Filed June 1, 1949 ATTORNEYS W... ms 'iu July 17, 1951 w. R. REED ,1

TRIPLE CAPACITY PLUNGER EUMP Filed June 1, 1949 4 Sheets-Sheet 3 W R Read j wwr v ATTCIR N EYS Juiy 17, 1951 W. R. REED TRIPLE CAPACITY PLUNGER PUMP 4 Sheets-Sheet 4 Filed June 1, 1949 INVENTOR. .W R Rc ATTORNEYS Patented July 17, 1951 UNITED STATES PATENT OFFICE,

2,561,227 TRIPLE CAPACITY PLUNGER PUMP Wade R. Reed, Tulsa, Okla.

Application June 1, 1949, Serial No. 96,557

The present invention relates to the general class of motor operated reciprocating pumps of the multiple plunger unit type, and more specifically to an improved triple capacity plunger pump which while adapted for various purposes and uses as a hydraulic high pressure pumping appliance, is especially designed for pumping acid into sands for acidizing oil wells.

The variable capacity units forming the plunger pump are embodied in the fluid end of a 1 .for effecting the various capacities and pressures, as high capacity, low capacity, andmedium capacity operations of v the appliance.

In the operation of acidizing the oil sands unexpected pressures and difficulties are frequently encountered, which cannot be met by a single capacity pump, and if the pressure is higher than anticipated, a smaller capacity pump must be substituted that is capable of delivering at a higher pressure, thus incurring delay and expense in the pumping operations.

As an example of the superior utility of the .triple capacity appliance of my invention over a single plunger type of pump having a capacity of 200 gallons per minute at 2000 lbs. pressure, the. triple capacity pump would have a plunger assembly of the same volume and pressure, to-

gether with a low capacity plunger assembly and a medium capacity plunger assembly neutralized or locked in position. v v

The triple plunger units include interchangeable and adjustable plunger sections and accessories that may be manufactured with facility and low cost of production, and the parts may be assembled with convenience to produce an appliance that is comparatively simple in construction and operation, and durable and efficient in the performance of its functions.

The invention consists in certain novel features of construction and combinations and arrangements of parts as will hereinafter be described and more particularly set forth in the appended claims.

In the accompanying drawings I have illustrated a complete example of a physical embodi- 4 Claims. (01. 103-37) ment of my invention including multiple pumping units, in which the parts are combined and arranged in accord with one mode I have devised for the practical application of the principles of the invention.

It will however be understood that changes and alterations are contemplated and may be made in these exemplifying drawings and mechanical structures, within the scope of my claims, without departing from the principles of the invention.

Figure 1 is a plan view of an appliance in which the triple capacity plunger type fluid end of my invention is combined with the power end of the appliance; and Figure '2 is a view in side elevation of the pump.

Figure 3 is an enlarged vertical longitudinal sectional view at line 3-3 of Fig. 1 showing the high capacity unit. I

Figure 4 is a further enlarged detail sectional view showing portions of the high capacity and low capacity plunger sections.

Figure 5 is a diagrammatic view showing the arrangement of the crank shaft of the power mechanism; and Figure 6 isa detail view of the crank shaft.

Figure '7 is a vertical longitudinal sectiona view of the high capacity plunger unit.

Figure 8 is a similar view of the arrangement of the sectional plunger of the medium capacity pumping unit; and

Figure 9 is a similar view of the arrangement of the sectional plunger unit of the low capacity pumping unit.

In the assembly views where the appliance is supported upon a base I, the power-end of the triplex pump has a main frame 2, with its detachable plate 3, and an electric motor lVLis equipped with a multi-belt drive 4 for the transversely journaled pinion shaft 5 which actuates the pinions and gears in the housings 6, 6. Power is transmitted through this gearing to a threethrow crankshaft 1 that is journaled within the main frame in bearings as 8, and the shaft is fashioned with three journals, as 9, 9a, and 9b,

spaced at angles of one hundred and twenty degrees for the triple capacity plunger units of the pump.

The main frame is united by three horizontally disposed tubular cross-head guides ID with the pump frame II, and the usual tie-bolts l2 passing through the pump frame are fastened by lock nuts I3 to the triple plunger units H, M, and L at the fluid end of the pump. An underslung intake or suction manifold l5 extendingtransversely of the units supplies the fluid, and an overhead outlet or discharge manifold It leads to the connections for conveying the fluid to the well.

Each of the triple plunger units is operated from the three-throw crank shaft by its connecting rod ll which is coupled by a wrist pin 18 to a cross head ii] that reciprocates in a guide It.

The three plunger units are mounted to operate in. a unit H of maximum capacity and low pressure, a unit M of medium capacity, and a third unit L for low or minimum capacity, and each of these units includes a horizontal cylindrical barrel 29 having an attaching flange N that is tied to the main frame by means of the bolts l2.

For stabilizing the units a supporting bracket 21 is mounted on the base I, and each unit includes an upright valve casing 22 having a side face 23, the upper end of the. casing being closed by a head cap 2 3 bolted. to the casing and located just above a discharge port 25 that opens into the manifold l5.

A pressure lifted discharge valve 2'6 automatically closes the outlet valve-seat illin the casing, and a boss .28 on the head cap 24 limits the openi'ng movement of the pressure lifted valve. The lower intake or' suction end of the" valve casing is provided with an intake valve 29 that: opens upwardly from its seat 3!) to admit fluid from the supply manifold l into the casing; and closes under pressure to cut off the supply.

At the outer side of each valve casing a bearing yoke 31 is bolted to the casing face 23,. and the yoke is fashioned with an integral cylindrical bearing sleeve or bushing 32 that projects into the casing and terminates approximately atits vertical axis or center line. Within the sleeve is mounted a plunger section 33 that is axially alined with the cross head 19 and the longitudinal axis of the crank shaft, and a suitable packing as 34 is mounted in the sleeve for the plunger section, and retained by a retaining ring or nut 35 threaded in the outer end of the sleeve.

The outer end of the plunger section 33 is drilled and threaded to form a socket 3d, and for selective use this socket is adapted to receive a headed bolt 3! adapted to be mounted in an endbore of the yoke, and a spacer or bushing 33 is provided for selective use between the exterior face of the yoke and the head of the bolt 37.

This outer plunger section 33 is adjustable for selective uses in the operation of the pump and with relation to the other two sections of a pumping unit, and section 33 may be held stationary by the use of the bolt 37 and spacer as. for high and low capacity operations, as indicated in Figs. 3, T, and 9. In the capacity arrangement of Fig. '7,v the spacing bushing 38. is employed with the bolt for retaining the section 33 with its inner end 39 entirely Withdrawn within the sleeves and its outer end backed against the inner face of the yoke.

In the lower capacity and high pressure arrangement of Fig. 9, the spacer is dispensed with and the bolt is threaded deep into the socket of section 33, for adjusting the section with its threaded end 39 protruding from the inner end of the sleeve for attachment to the high-capacity section of the plunger unit.

For the medium capacity arrangement in Figure 8, both the bolt and the spacer are dispensed with, and the section 33 is adapted to reciprocate within the bearing sleeve due to its coupling with the reciprocable, tubular, high capacity plunger section of the pumping unit.

The plunger sections of each unit are activated from the reciprocating cross head I9 that is equipped with an integral or rigidly attached stem 49 that slides through a stufi'ing box or packing gland M at the power side of the frame H, and also projects through a flanged packing gland Ma that is. bolted to the: inner end of the barrel 2!]. The free end. of the stem has an integral annular retaining head 42 that is entered in an internally threaded countersunk bore or coupling socket 415 of a tubular plunger section 4 5, and the coupling head is locked in its socket by a threaded lock ring 43a that clamps the head against a shoulder of the tubular section.

The cylindrical tubular section 44 is packed within the barrel 20, as at 45, and the packing is confined by the flanged gland Ala for sealing the tubular plunger section in its reciprocating movement with the coupled stem 40.

The exterior diameter of the tubular section is substantially greater than the exterior diam eter-of the adjustable plunger section 33, and the closed end orhead of the tubular section which projects into the valve casing 22 provides a large circular area or face that is effective for the high or maximum capacity operation of the plunger unit.

The tubular section is adapted for selective use with the section 33 for medium capacity pump ing, as in Fig. 3, and for low capacity pumping as in Fig. 9, and for these uses the closed end of the tubular section is drilled and threaded to provide a C0llpling socket 46 for the reception of the threaded stud 3 9 of section 33-.

For low capacity pumping, as in Fig. 9, the closed end of the tubular section is drilled to form an annular series of spaced declining ports 4'3 that open to the interior of the valve casing and to the interior of the tubular plunger section, while the section 33 and the tubular section 44 are rigidly jointed with the end of the tubular section clamped against the end of the bearing sleeve 32 within the valve casing.

The low capacity pumping action through the ports il is effected by the reciprocating movement of a solid cylindrical plunger section 48 mounted in the bore of the tubular section 44 and integral with the ring or head 52 of th stem ac, which is packed within the tubular section as at 49, and the packing is retained by means of a ring 59 encircling the section 43 and threaded Within the bore of the tubular: section. On the instroke of the stem at and plunger section 48, valve 29 is lifted and a charge of fluid enters the interior of the valve casing, and on the outstroke of the low capacity plunger section :38 the outlet valve 25 is lifted and the charge passes through port 25 to the discharge manifold.

In the medium capacity arrangement in Fig. 8 where the tubular section and section 33 are coupled to reciprocate only the annular fiat face at the end of the tubular section is effective for pumping action, and the ports 47 of the tubular plunger section are closed by the low capacity plunger section 48.

The various plunger sections are readily accessible for use by hand tools, as a spanner wrench, in coupling and uncoupling parts of the interchangeable and adjustable plunger sections 33, 44, and 48, and the triple pumping units may readily be adjusted to three capacities and pressures. Depending upon the size of the plunger sections, the pumping units may have a capacity and pressure ranging from 200 gallons at 2000 lbs. pressure; 100 gallons at 4000 lbs. pressure; and 50 gallons at 8000 lbs. pressure; all having the same load on the power end of the pumping appliance and requiring the same horsepower to drive the units; and intermediate capacities may be regulated by the motor or engine speed.

As shown in Fig. '7 the tubular plunger section 49 has a maximum capacity pumping area at its circular end; in Fig. 8 the coupling stud of section 33 reduces this area to approximately one half for the medium capacity; and in Fig. 9 the plunger section 48 has a pumping area of approximately one fourth that of the maximum area of section 44.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination with a valve casing having a barrel and an axially alined sleeve, an intake valve and a spaced discharge valve, of a plunger assembly including a tubular section and a coaxial plunger section movable with the tubular section, means for reciprocating the coaxial section and tubular section in the barrel, a solid cylindrical plunger section mounted in the sleeve, and retaining means for the cylindrical plunger section.

2. The combination with a valve casing having a barrel and an axially alined sleeve, an intake valve and a spaced discharge valve, of a plunger assembly including a tubular section and a coaxial plunger section movabl therewith, means for reciprocating the coaxial sections in the barrel, a cylindrical plunger section mounted in the sleeve, and detachable means for rigidly mounting the cylindrical plunger section in the sleeve.

3. The combination in a hydraulic reciprocating pumping unit, with a valve casing having a barrel, an axially alined sleeve, an intake valve and a discharge valve, of a cylindrical plunger section rigidly mounted in the sleeve, a tubular section rigidly mounted in the barrel and united with the cylindrical plunger section, said tubular section having fluid ports opening through the valve casing, a coaxial plunger section reciprocable in the tubular section, and means for operating the coaxial plunger section.

4. The combination in a hydraulic reciprocating pumping unit, with a valve casing having a barrel, a sleeve axially alined therewith, an intake valve and a spaced discharge valve, of a tubular plunger section rigidly mounted in the barrel and having fluid ports opening through the casing, a plunger section rigidly mounted in the sleeve and united with the tubular section, a coaxial cylindrical plunger section reciprocable in the tubular section, and means for operating the cylindrical plunger section.

WADE R. REED.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,263,401 Fraser Apr. 23, 1918 1,598,137 Jacobsen Aug. 31, 1926 2,083,854 McGee June 15, 1937 2,239,853 Louree Apr. 29, 1941 2,256,099 Mayer Sept. 16, 1941 2,434,296 Swanson Jan. 13, 1948 

